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Device for rotating turntable

a technology of rotating turntables and turntables, which is applied in the direction of anchoring arrangements, waterborne vessels, vessel construction, etc., can solve the problems of substantial wear, too large boggy systems, and less loaded turret bearings

Active Publication Date: 2013-08-08
ADVANCED PRODUCTION AND LOADING AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a structural spring system that uses strong shafts to simplify the flexibility of supportive structures. This system reduces wear and fatigue. Additionally, the patent also explains a simple method for replacing a wheel with a shaft. The technical effects of this patent include reduced maintenance costs and improved efficiency of the structural spring system.

Problems solved by technology

Boggy systems are too comprehensive for less loaded turret bearings.
One major disadvantage with the cylindrically shaped wheels is that there will be substantial wear caused by relative movements between the wheel and the rail at the inward and the outward portions of the contact surfaces between the wheel and the rail.

Method used

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Examples

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Embodiment Construction

[0023]The turret mounted in the vessel shown in FIG. 1 is mounted into a through-going hole / well 8 in the vessel 1. Mooring lines 2 are suspended in the lower portion of the turret, and used for mooring the vessel to the sea floor 3. Risers and cables may also be suspended from the turret to the sea floor or to a structure or a floating unit in its vicinity. A turret bearing system 6 is mounted onto a bearing support structure 7.

[0024]A swivel coupling 31 is used for bridging the conduits and cables across to the vessel.

[0025]The vessel may be a large ship or a smaller loading buoy being used for transferring products to or from a vessel moored to the anchored vessel 1.

[0026]The bearing system may also be used for turntable simply carrying the weights of the piping and equipment required for the transfer of the products to the vessel.

[0027]A further application may be for supporting large drums onto a rail system on the ground. In general, there is no limit to the application of the...

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PUM

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Abstract

A device for rotating a turntable includes a turret and a turntable bearing The turret is rotatable in a through-going opening or well in the hull of a vessel and has axial and radial bearing assemblies arranged in a polar array about the turret center line. In order to reduce the substantial wear caused by relative movements between the axial wheels of the bearing assembly and the circular rail on the bearing support structure, the axial wheels are conically shaped with a double curved surface rolling on the upward facing edge of the circular rail with a slope aligned with an extension line of the rail substantially intersecting with the shaft center line at the center line of the turret. The radial bearing assembly includes horizontally arranged radial wheels with double curved surfaces. Each wheel rolls on an inward facing edge of the circular rail.

Description

FIELD OF THE INVENTION[0001]The invention relates to a device for a rotating turntable comprising a turret and turntable bearing for a vessel, such as a drilling or production vessel for recovery of oil offshore, the turret is rotatable in a through-going opening or well in the hull of the vessel and having axial and radial bearings assemblies arranged in a polar array about the turret centre line.BACKGROUND OF THE INVENTION[0002]Turret Wheel Bearing systems are known from U.S. Pat. No. 6,269,762 Vessel—turret assembly having radially guided bogie wheels and U.S. Pat. No. 5,359,957 Turret for Drilling or Production Ship. Turret wheel bearing systems known have cylindrically shaped wheels.[0003]Both these solutions have bogie wheels requiring two tracks. They are designed for large turret loads. Boggy systems are too comprehensive for less loaded turret bearings.[0004]Turrets with single wheel systems such as the GNO patented turret bearing system are based on load sharing through a ...

Claims

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Application Information

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IPC IPC(8): B63B21/50
CPCB63B21/507
Inventor ASKESTAD, SIGMUND
Owner ADVANCED PRODUCTION AND LOADING AS
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